Binding terminal with connecting pieces



p 1930- A. P. G. GUILLARD 1,774,970

BINDING TERIINAL WITN CONNECTING PIECES 19d Nov. 29, 1926 v or a wire might be broken between any two Patented Sept. 2, 1930 UNITED STATES PATENT oFFIcE ALBERT PAUL GABRIEL GUILLARD, OF PARIS, FRANCE, AS SIGNOR TO SOCIETE AN- ONYME DU MATERIEL SIMPLIO, OF PARIS, FRANCE, A CORPORATION OF FRANCE BINDING TERMINAL WITH CONNECTING PIECES Application filed November 29', 1926, Serial No. 151,406, and in France December, 3, 1925.

The binding terminals, or posts serving to connect the ends of electric wires which are employed for telephone installations, electric bells, annunciators, or the like, are mounted upon flat bases which are designated as terminal boards. A certain number of such boards may be placed together in a piece of furniture or frame to form a distributing board. Such devices are subject to the following defects 1. Due to their form of construction, the binding parts cannot be connected together.

2. The wire must be carefully and accurately maintained by the screw, since it is subject to loosening and may leave the binding post by reason of internal or external jarring action.

3. Faults are diflicult to locate; for instance a certain number of wires connected with a given terminal board might be short-circuited within a cable covered by its lead sheath,

connecting points. Such faults can only be located by unscrewing a binding terminal and removing the wire therefrom, but this operation is complicated, and after a certain number of such operations the wire will break, and the conductor must be restored to the proper condition, thus resulting in a certain expense as well as a loss of time.

The binding terminal, the subject matter of the present invention, will obviate all the aforesaid defects. The following description with reference to the appended drawings which are 'ven by way of example shows various em odiments of the invention.

Fig. 1, is an elevational view, partly section on the line A-A of Fig. 3, of a pair of binding posts provided with their connecting member.

Fig. 2, is a side View of the same showing the slot for holding the wire.

Fig. 3 is a plan view looking from the top of Fig. 1.

Fig. 4 is a broken out plan view partly in section on the line BB of Fig. 2, showing the form given to the connected wire.

.Fig. 5 is a view partly in section and partly in elevation of a modified construction of the ginding posts and of their connecting mem- Fig. 6 is a plan view ofa second modification of the connecting member.

Fig. 7 is a vertical section of a second modification of a binding post.

As shown in Figs. 1 to 4, each binding post consists of a bolt or screw a with a head, said bolts or screws being bored longitudinally or axially at I) also said bolts or screws are slotted for half their length and each is provided with two nuts, the nuts 0 serving to secure the said bolts or screws to an insulating piece of backing of any kind, while the nut (1 serves to hold the wire e. Due to the slot f the Wire to be connected may be readily inserted, and I further provide a perfect contact for the member 9 which serves for conecting purposes. The contact or conducting member 9 is of inverted U-shapc and its down-turned end parts fit closely in the bores of the bolts a.

The assembled parts consisting of the two binding posts connected together by the said member 9 thus constitutes a terminal unit or element, and a certain number of such elements mounted upon a Wood base or board is designated as a terminal board.

I obtain a great advantage in this construction dueto the fact that the testing of any of the connected wires will no longer require the removal of the wire from the binding post, for the connecting member 9 will suffice for this purpose.

The jarring .eiiects which might loosen the nuts and cause the wires to leave the binding post, will no longer cause the breakage of the wire, for the latter will be held by the pressure of the connecting member 9 due to the slot in the binding post.

. In the construction which is shown in Figs. 1 to 4, each of the screws or bolts a is bored entirely through, including the head, but

it might be bored for only a part of its length,

or threaded rod a will be terminated by a reduced end part it co-operating with any suitable type of connecting member 9. As shown in Fig. 5, the said member may consist of-a plate, strip or round rod 9 having at each end a recessed part or cap 2' fitting by friction upon the respective ends lb, or it may consists simply of a tube which is curved into a U shape.

Fig. 6 shows a modification of the connecting member 9 adapted to co-operatc with the binding osts which are not bored and which comprise reduced end parts as shown in Fig. 5; the said member consists of a strip whose ends are apertured at j and areprovided with longitudinal slots is affording an elastic device.

I might further dispense with the central bore and with the slots f, and the wire to be connected is simply inserted transversally into a diametrically situated aperture 1 (Fig. 7) formed in the screw, threaded rod or like member a which in this case is solid, and the wire may be held by the upper nut (1.

Obviously, I may in the same order of ideas make various modifications and improvements in detail, without departing from the principle of the invention.

What I claim is: i

1. A binding post terminal unit or element comprising two split and exteriorly threaded binding post headed bolts which are constructed for the reception of conducting wires, and a removable conducting member connecting said bolts, the latter being each provided with two adjacent nuts two of said nuts serving to attach said bolts to a terminal board and the other two serving to clamp the wires to said terminal board nuts.

2. A binding post terminal unit or element comprising two split and exteriorly threaded binding post headed bolts which are adapted for the reception of conducting wires, and a removable U-shaped conducting member connecting said bolts, the latter being each provided with two adjacent nuts two of said nuts serving to attach said bolts to a terminal board and the other two serving to clamp the conducting wires to said terminal board nuts, said bolts being bored longitudinally and said conducting member having downturned ends fittin the bore of said bolts.

In testimony whereof I afiix my signature.

' ALBERT PAUL GABRIEL GUILLARD. 

